--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/commonutilities/common/inc/glxsingletonstore.inl Tue Aug 31 15:14:51 2010 +0300
@@ -0,0 +1,78 @@
+/*
+* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: TLS store for singleton objects
+*
+*/
+
+
+
+#include <glxlog.h>
+#include <glxpanic.h>
+
+// -----------------------------------------------------------------------------
+// Return new or existing instance
+// -----------------------------------------------------------------------------
+//
+template <class T>
+T* CGlxSingletonStore::InstanceL( T* (*aFactoryFuncL)() )
+ {
+ // Get new or existing pointer to store.
+ // InstanceL stores the pointer in TLS
+ CGlxSingletonStore* store = InstanceLC();
+
+ // Try to find existing object of type T
+ TInt count = store->iSingletons.Count();
+ TInt i = 0;
+ T* obj = NULL;
+ while (i < count && !obj)
+ {
+ obj = dynamic_cast<T*>(store->iSingletons[i].iObject);
+ if (obj)
+ {
+ // Found an existing object of type T
+ GLX_LOG_INFO1("CGlxSingletonStore::InstanceL, Found existing object %x", obj);
+ // Add another reference
+ store->iSingletons[i].iReferenceCount++;
+ }
+ i++;
+ }
+
+ // Create new object if one did not exist
+ if ( !obj )
+ {
+ // If these calls leave, Cleanup stack will make sure tls
+ // pointer is cleared, if there are no other clients for CGlxSingletonStore
+ // class
+
+ // Reserve space in the array so that can safely append
+ store->iSingletons.ReserveL( count + 1 );
+
+ // Create a new object via provided factory function
+ obj = aFactoryFuncL();
+
+ // Give ownership of the new object to store
+ TSingleton singleton;
+ singleton.iObject = obj;
+ singleton.iReferenceCount = 1;
+ store->iSingletons.Append(singleton);
+
+ GLX_LOG_INFO1 ("CGlxSingletonStore::InstanceL, Created new object %x", obj);
+ }
+
+ // Remove singleton store from cleanup stack
+ CleanupStack::Pop(store);
+
+ return obj;
+ }
+